Tag: ISM

On the unlicensed 869 MHz frequency band, there is a limitation in the duty cycle in Europe. Without Listen Before Talk, the channel can be used for transmissin for only 36 seconds per 1 hour (1% of 3600 seconds). If a weather station wants to send its measured value every second, this leads to a […]

OBU (On Board Unit) and short-range radios An inexpensive trailer detection on 2400 MHz radio modules is indeed already published. http://www.gsm-modem.de/M2M/m2m-faq/trailer-detection-active-rfid/ Through the use of ICs, which were developed for consumer products, the bill of materials is very low. Last week, a GSM / ISM Bridge required based on Linux. A GPS module is also […]

The ME50-169 Wireless M-Bus radio module featuring 25 mW output power This license free radio module was specifically designed for meter reading in the 169 MHz band. The M-Bus (Meter-Bus) is a European standard for remote reading of meters for electricity, gas and water. It started as a wired bus and was later on converted […]

ANT+, Bluetooth, Bluetooth Low Energy, ZigBee – each technology has it market First of all I would like to mention, that I am supporting all RF technologies (Buetooth,Bluetooth Low Energy, ANT+, Gazel and ZigBee) mentioned in the text as below. Every technology has its market. 1. Qualification cost comparison ANT+, Bluetooth, Bluetooth Low Energy, ZigBee […]

Today I would like to show and to talk about a new Linux based application for wireless M2M. The PCB is already in use in several projects. Based on its enclosure it can be used as a final product for end users. It supports a lot of interfaces like SD card / MMC card, GPIO Pins , AD / DA converter, UARTs, USB Device, USB Host, I2C, SPI and JTAG. At GPIO you will find PMW (Pulse Wide Modulation), counters and other intelligent channels.

Reference Design for RF Remote To ease the process, an RF remote control reference design such as the nRD24H1 is available. The device (transmitter) side of the nRD24H1 is implemented as a hardware module fitted on a six-button remote control application board. The module includes a PCB antenna, a 2.4GHz transceiver (the nRF24L01) and an […]

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Why I wrote the IoT M2M Cookbook

In my more than 20 years working with a manufacturer and in distribution I gave the same hints and recommendations to developers of wireless applications again and again. In May 2012 I made the decision to write the story that I have to tell weekly to customers in a book. The target is to guideline developers from the idea for an IoT / M2M device to a final product with mass production.
http://www.gsm-modem.de/M2M/m2m_iot_cookbook/